A rekeyable lock cylinder includes a plug body with a keyway opening along a longitudinal axis and a multiple of channels transverse to the axis. A locking bar generally parallel to the longitudinal axis, the locking bar having an extension. A slide movably mounted to an end section of the plug body, the slide having a slot which selectively permits passage of the extension during a rekeying procedure.
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11. A rekeyable lock cylinder comprising:
a cylinder which defines a longitudinal axis;
a plug body rotatable within said cylinder;
a multiple of pins movably mountable within said plug body transverse said longitudinal axis;
a multiple of biasing members to bias said multiple of pins toward a keyway;
a carrier mountable adjacent said plug body;
a multiple of racks slidably movable transverse to said longitudinal axis, said multiple of racks engaged with said multiple of pins in response to said carrier being at a first predetermined position, said carrier axially displaceable along said longitudinal axis to selectively disengage said multiple of racks from said multiple of pins in response to said carrier being at a second predetermined position; and
a locking bar mounted at least partially within said carrier generally parallel to said longitudinal axis, said locking bar having an extension; and
a slide movably mounted to an end section of said plug body, said slide having a slot that selectively permits passage of said extension during a rekeying procedure.
8. A rekeyable lock cylinder comprising:
a cylinder body which defines a longitudinal axis;
a plug body with a keyway opening along said longitudinal axis and a channel transverse to said longitudinal axis;
a carrier disposed adjacent said plug body;
a locking bar mounted at least partially within said carrier generally parallel to said longitudinal axis, said locking bar having an extension;
a multiple of racks slidably movable transverse to said longitudinal axis, wherein the locking bar is configured to engage the multiple of racks; and
a slide movably mounted to an end section of said plug body, said slide having a slot that selectively permits passage of said extension depending on whether a rekeying process is successful;
wherein said slide includes a first leg and a second leg, wherein said first leg is not in contact with said second leg, the first and second legs connected by a transverse member, said longitudinal axis intersects said transverse member;
an arm that extends in an opposite direction from said transverse member with respect to said first leg and said second leg; and
a spring post which extends from said arm.
1. A rekeyable lock cylinder comprising:
a plug body with a keyway opening along a longitudinal axis and a multiple of channels transverse to said axis, said plug body having a first position in which said lock cylinder operates and a second position in which said lock cylinder is configured to be rekeyed by a new key insertable in said keyway;
a locking bar generally parallel to said longitudinal axis;
a multiple of racks slidably movable transverse to said longitudinal axis, wherein the locking bar is configured to engage the multiple of racks;
a slide movably mounted to said plug body, said slide having a slot that allows passage of said locking bar if said new key is completely inserted in said keyway such that said plug body may be moved to said first position;
wherein said slide includes a first leg and a second leg, wherein said first leg is not in contact with said second leg, the first and second legs connected by a transverse member;
wherein said slide further comprises an arm extends in an opposite direction from said transverse member with respect to said first leg and said second leg; and
a spring post that extends from said arm.
2. The rekeyable lock cylinder as recited in
3. The rekeyable lock cylinder as recited in
4. The rekeyable lock cylinder as recited in
5. The rekeyable lock cylinder as recited in
6. The rekeyable lock cylinder of
7. The rekeyable lock cylinder of
9. The rekeyable lock cylinder as recited in
10. The rekeyable lock cylinder as recited in
12. The rekeyable lock cylinder as recited in
an arm which extends in an opposite direction from said transverse member with respect to said first leg and said second leg; and
a spring post which extends from said arm.
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The present disclosure relates to rekeyable lock cylinders.
When rekeying a cylinder using a traditional cylinder design, the cylinder plug is removed from the cylinder body and the appropriate pins are replaced so that a new key can be used to unlock the cylinder. This typically requires removal of the cylinder mechanism from the lockset and disassembly of the cylinder to some degree to remove the plug and replace the pins. This requires a working knowledge of the lockset and cylinder mechanism. Additionally, the process usually employs special tools and requires access to pinning kits to interchange pins and replace components that may become lost or damaged in the rekeying process.
Some rekeyable cylinder designs utilize the familiar experience of rotating the key in the lock cylinder such that no special knowledge, training, or tools to rekey the lock cylinder are required. In some instances, however, the cylinder is rotated before the new key is fully inserted. This may result in a mismatch between the new key and the plug and is referred to as a “blown cylinder.”
Various features will become apparent to those skilled in the art from the following detailed description of the disclosed non-limiting embodiment. The drawings that accompany the detailed description can be briefly described as follows:
A lock cylinder 10 according to one non-limiting embodiment of the present disclosure is illustrated in
The cylinder body 12, as seen in
Referring to
The intermediate portion 46 includes a main portion 70 formed as a cylinder section having a first longitudinal planar surface 72 and a plurality of channels 74 transverse to the axis A for receiving the spring-loaded pins 38. The channels 74 extend transversely to the longitudinal axis of the plug body 40 and parallel to the planar surface 72. A second planar surface 76 extends perpendicular to the first planar surface 72 and defines a recess 80 for receiving a retaining cap 82 (
The carrier sub-assembly 42 (
Each spring-loaded pin 38 includes a pin 113 and a biasing spring 115. The pins 113, illustrated in
The spring-loaded locking bar 94, illustrated in
The spring-retaining cap 82, illustrated in
To assemble the lock cylinder 10, the pins 113 and spring 115 are disposed in the channels 74 of the plug body 40. The spring-retaining cap 82 is placed in the recess 80, with the cap retaining tips 152 disposed in the alignment openings 154 and the spring alignment tips 146 engaged with the springs 115. The carrier sub-assembly 42 is assembled by placing the racks 92 into the slots 103 and the spring-loaded locking bar 94 into the locking 5 bar recess 106, with the gear teeth 136 engaging the locking bar-engaging grooves 132 formed in the racks 92.
The spring catch 96 is disposed in the spring catch recess 108 of the carrier 90. A valid key K is inserted into the keyway opening 52, the return spring 98 is compressed into the return spring recess 112, and the carrier sub-assembly 42 is placed adjacent the plug body 40, as illustrated in
The properly keyed lock cylinder 10, without the key K inserted, is illustrated in
The internal configuration of a lock cylinder 10 with the valid key K inserted therein at the home position is illustrated in
To rekey the lock cylinder 10, the valid key K is inserted into the keyway opening 52, as illustrated in
With the spring catch 96 disposed in the first detent recess 30, the racks 92 are disengaged from the pins 113, as illustrated in
An alternative embodiment of a lock cylinder 200 is illustrated in
Referring to
A set of pin biasing springs 226 (also illustrated in
A spring catch 228 (
The pins 244 (
The racks 250 (
The modified locking bar 252 (
Referring to
The rekeying feature 300 generally includes a modified plug body 202′, a modified carrier 236′ and a modified locking bar 252′ along with two additional components which are a slide 302 and a slide spring 304. The rekeying feature 300 operates to prevent rekeying unless the key K to be learned is fully inserted within the keyway opening 52 and the key K2 is in contact with a keystop 306 in a plug face 204′ of the plug body 202′ and all of the slots of the new valid key K2 are engaged with the associated pins 244 prior to the new valid key being rotated back to the home position.
Referring to
Referring to
Referring to
Referring to
In operation, the rekeying feature 300 assures the key to be learned is properly inserted to avoid a blown cylinder.
To rekey the lock cylinder 200′, the current valid key K is inserted into the keyway opening 52, as discussed above.
Referring to
Once the plug body 202′ is rotated to the learn position which, in one non-limiting embodiment is greater than approximately 29 degrees, a pointed tool T is inserted into the tool opening 54 (
With the feature 340 disposed in the recess 338, the racks 250 are disengaged from the pins 244 as discussed above. The key K is removed and a second key K2 with a different bit arrangement is inserted. Once fully inserted, the second key K2 may be used to rotate the plug body 202′ (
With reference to
As the second key K2 is fully inserted, the slide 302 is moved aftwardly to align the extension 320 with the extension slot 334 (best seen in
With reference to
Although particular step sequences are shown, described, and claimed, it should be understood that steps may be performed in any order, separated or combined unless otherwise indicated and will still benefit from the present disclosure.
The foregoing description is exemplary rather than defined by the limitations within. Various non-limiting embodiments are disclosed herein, however, one of ordinary skill in the art would recognize that various modifications and variations in light of the above teachings will fall within the scope of the appended claims. It is therefore to be understood that within the scope of the appended claims, the disclosure may be practiced other than as specifically described. For that reason the appended claims should be studied to determine true scope and content.
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